Trane and ASHRAE/IESNA Standard 90.1
ASHRAE Standard 90.1 is a code-language document that has been adopted as state or local energy code
in many jurisdictions. Alternatively, a jurisdiction may choose to adopt the International Energy
Conservation Code (IECC), which allows ASHRAE 90.1 as a compliance path. Standard 90.1 is updated by addenda
that are compiled every 18 months, and is published in full every three years.
Trane leads the industry in energy efficiency in many equipment categories and can provide equipment
that meets the prescribed efficiency levels of ASHRAE 90.1. In many cases, Trane equipment exceeds the
minimum requirements, and can help to generate energy savings for reducing operating costs, and for
demonstrating environmental stewardship. Find out more about
ASHRAE 90.1 and LEED.
The Performance Rating Method (Appendix G) of ASHRAE Standard 90.1-2004 is the basis for calculating
energy savings. The calculation requires the use of a full-featured simulation program. Trane offers
the industry’s most time-tested analysis software in
TRACE™ building load and energy
analysis programs to model building performance. Trane is continuously adding features that can help
demonstrate savings and compliance with energy code. Trane’s CDS™ support center is available for
assistance to run these programs.
Going Beyond Minimum Requirements
ASHRAE 90.1 defines minimum requirements. Building and systems can always go beyond
these minimum requirements, and above-code and/or rebate programs typically require
that you do. ASHRAE has provided the following guidance for exceeding ASHRAE 90.1
by 30% or more:
Advanced Energy Design Guides (AEDG)
The AEDG for small retail buildings, small office buildings, and K-12 school buildings
have been published. They can be ordered in print version from ashrae.org, or downloaded for free
The AEDG can be used as a prescriptive path for achieving two LEED points.
ASHRAE Standard 189P
This proposed standard is currently in development. Its goal is to exceed 90.1-2004
by 30%. Standard 189 is co-sponsored by the U.S. Green Building Council (USGBC).
For more information or training